CN105528366A - A data synchronization control method and device - Google Patents

A data synchronization control method and device Download PDF

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Publication number
CN105528366A
CN105528366A CN201410521771.5A CN201410521771A CN105528366A CN 105528366 A CN105528366 A CN 105528366A CN 201410521771 A CN201410521771 A CN 201410521771A CN 105528366 A CN105528366 A CN 105528366A
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data transmission
speed
transmission blocks
data
described data
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CN201410521771.5A
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CN105528366B (en
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张青林
张文亮
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Beijing Oceanbase Technology Co Ltd
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Alibaba Group Holding Ltd
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Abstract

The invention provides a data synchronization control method and device. The method is applied to the data synchronization control device comprising a data transmitting module and a synchronization monitoring module. The method comprises the steps that the data transmitting module obtains to-be-synchronized update data; the data transmitting module judges whether the preset sleep conditions are met; if so, the data transmitting module transmits the update data to a synchronization device after a preset sleep time. The bandwidth occupied by data synchronization is reduced and the influence on a standby and service are reduced.

Description

A kind of data synchronization control method and device
Technical field
The present invention relates to computer technology, particularly a kind of data synchronization control method and device.
Background technology
Current database has become indispensable data storage device, may be used for enterprise's storage service data, and in order to provide higher guaranteed reliability, master/slave data storehouse being set usually and backing up, be called master library and standby storehouse, the data of master library will be synchronized to standby storehouse in time.In addition, larger enterprise arranges the database stored for data usually respectively in different regions, such as A ground database and B ground database, also need between the database of these two places to carry out data syn-chronization, to meet business demand, such data syn-chronization can be called application of synchronized, adopts the data syn-chronization such as Jingwei, DRC mode synchronized update data.
In current data syn-chronization, the synchronous principle usually all taking to send as possible of application of synchronized and standby storehouse, as long as IO is very strong, so data syn-chronization will be use up and how to be performed as soon as possible, but this can take comparatively large bandwidth, and cause following problem: on the one hand, its priority of standby storehouse as protection effect is higher, application of synchronized will take the data syn-chronization of more bandwidth contributions for storehouse, standby storehouse may be caused unavailable when standby storehouse synchronization delay is larger; On the other hand, the data of master library, not only for above-mentioned data syn-chronization, also use for business, when such as business performs, the data in called data storehouse use, data syn-chronization take comparatively large bandwidth time, by traffic affecting response speed, reduce the execution efficiency of business.
Summary of the invention
In view of this, the invention provides a kind of data synchronization control method and device, with the speed that control data is synchronous, reduce the impact on standby storehouse and business.
Particularly, the present invention is achieved through the following technical solutions:
First aspect, provides a kind of data synchronization control method, and described method is applied to data syn-chronization control device, and described device comprises data transmission blocks and synchronization monitoring module; Described method comprises:
Data transmission blocks obtains more new data to be synchronized;
Described data transmission blocks judges whether to meet the dormancy condition preset, and if so, then described more new data, after the dormancy time through presetting, is sent to synchronous device by described data transmission blocks.
Second aspect, provides a kind of data syn-chronization control device, comprising: data transmission blocks and synchronization monitoring module; Wherein, described data transmission blocks, for obtaining more new data to be synchronized, and judge whether to meet the dormancy condition preset, if so, then described more new data, after the dormancy time through presetting, is sent to synchronous device by described data transmission blocks; Described default dormancy condition is by described synchronization monitoring module installation.
Data synchronization control method of the present invention and device, by when meeting the dormancy condition preset, data are sent stopping one section of dormancy time, achieve the control to data synchronous speed, such as by controlling the length of dormancy condition and dormancy time, the speed that data send can be adjusted, thus send relative to unrestricted the doing the best of data transmission in traditional approach, reduce the bandwidth that data syn-chronization takies, reduce the impact on standby storehouse and business.
Accompanying drawing explanation
Fig. 1 is the application schematic diagram of the data synchronization control method that the embodiment of the present invention provides;
Fig. 2 is the structural representation of the data syn-chronization control device that the embodiment of the present invention provides;
Fig. 3 is the schematic flow sheet of the data synchronization control method that the embodiment of the present invention provides;
Fig. 4 is the module relation diagram of the data syn-chronization control device that the embodiment of the present invention provides;
Fig. 5 is the schematic flow sheet that Binlog in the data synchronization control method that provides of the embodiment of the present invention sends thread execution;
Fig. 6 is the schematic flow sheet that the synchronization monitoring module in the data synchronization control method that provides of the embodiment of the present invention performs.
Embodiment
When carrying out data syn-chronization, the data synchronization control method of the embodiment of the present application, by performing the method by data syn-chronization control device, completes the synchronous of data.This data syn-chronization control device can be such as the programmed instruction be arranged on database server, shown in Figure 1, Fig. 1 shows the simple schematic construction of server, in the storer of server, not only store data to be synchronized, also store above-mentioned data syn-chronization control device; The processor be connected by bus with storer, this data syn-chronization control device can be called, by performing programmed instruction corresponding to this device, perform the data synchronization control method of the present embodiment, by network interface by data syn-chronization to be synchronized to other equipment, such as be synchronized to standby storehouse, or, by the data syn-chronization mode of Jingwei or DRC by data syn-chronization to other application servers.
The data synchronization control method of the present embodiment, execution is called by processor by being provided with above-mentioned data syn-chronization control device in memory, realize control during data syn-chronization, in change traditional approach, server is always in the principle transmitted as possible, make the speed of data syn-chronization can obtain certain control, reduce the bandwidth shared by data syn-chronization, reduce the impact on business usage data.
Based on this, the data syn-chronization control device of the present embodiment, comprises two modules, is data transmission blocks and synchronization monitoring module respectively, apparatus structure shown in Figure 2.By these two modules, this sync control device can perform the flow process shown in Fig. 3:
301, data transmission blocks obtains more new data to be synchronized;
302, data transmission blocks judges whether to meet the dormancy condition preset, and if so, then described more new data, after the dormancy time through presetting, is sent to synchronous device by described data transmission blocks.
Can see in above-mentioned step, data transmission blocks is when sending more new data to be synchronized, no longer send at once as the data that get in traditional approach, but can when meeting the dormancy condition preset, one section of dormancy time is stopped (not sending at once when that is getting more new data to be synchronized, first stop a period of time), then after this dormancy time preset, send these data again to synchronous device (such as application server), so just achieve the control of data synchronous speed and the reduction to synchronous occupied bandwidth.
The process as follows will described this data syn-chronization in detail and control, wherein, illustrates two modules in data syn-chronization control device, the logical relation when performing data synchro control by Fig. 4, follow-uply illustrate data syn-chronization in conjunction with this Fig. 4 and control:
First, Binlog is simply described as follows: when the data stored in database server occur to upgrade, more new data is all be stored in Binlog file, these more new data such as comprise: certain newly-increased business datum, or delete some data, or revise some data etc., and, more new data stores in units of Binlog_event, such as, data in certain list item are modified, so when recording, the mark of this list item can be called an event, the content (data a1 is revised as a2) of data change can as an event (event), that is, if " modifying to the data in certain list item " is called a things, this things may comprise multiple Binlog_event.Optionally, such as can be stored as list item as shown in Table 1 below when storing, three event can be produced:
Table 1Binlog_event
Time List item Former data------new data
10:02 A a1------a2
When carrying out data syn-chronization, be also undertaken synchronously by Binlog_event, such as, data transmission blocks reads a Binlog_event, this event is synchronized to standby storehouse, and then reads next event and be sent to standby storehouse etc.Standby storehouse, Jingwei, DRC are when carrying out data syn-chronization with master library, all undertaken synchronous by Binlog agreement, namely synchronization request message is sent by Binlog agreement to master library, master library according to this request read in units of Binnog_evcnt local Binlog file (this file be specify in request or acquiescence), then each Binlog_event in file is sent to standby storehouse or application server.
In the present embodiment, database server can pre-set two systematic parameters, as follows:
Binlog_send_idle_period this be Binlog send thread each " dormancy time ", unit is microsecond, and default value is 100; Wherein, it is exactly above-mentioned data transmission blocks that Binlog sends thread, and dormancy time just refers to that this module needs to stop a period of time sending before transmitting data again.
Binlog_send_limit_users this be that Binlog sends the speed configuration of thread, default value can be empty.Utilize this parameter can limit the speed of specific synchronizing thread, such as, arrange as follows: setglobalbinlog_send_limit_users=drc:3, jingwei:10, its effect is that to arrange the upper limit speed that DRC pulls Binlog (pull Binlog namely carry out Binlog synchronous) be 3MB/s, the upper limit speed that jingwei pulls Binlog is 10MB/s, the user's name that during DRC and jingwei wherein, application server uses when pulling Binlog.
Then, suppose that the data transmission blocks of the present embodiment and Binlog send thread specifically Dumpbinlog thread, perform according to the process flow diagram shown in Fig. 5 when it starts.
After Binlogdump thread starts, to check whether the user name that it connects should by speed limit, this user name refers to foregoing DRC, jingwei etc., and that is, Binlogdump thread checks that this thread itself is which kind of mode adopted carries out data syn-chronization.And whether apply by speed limit, this Binlogdump thread can be judge according to the above-mentioned systematic parameter binlog_send_limit_users pre-set, and this systematic parameter binlog_send_limit_users pre-set can be called default speed-limiting messages.
Such as, arrange binlog_send_limit_users=drc:3, arranging the upper limit speed that DRC pulls Binlog is that is to say 3MB/s, and the drc in this speed-limiting messages is the mark of data syn-chronization mode, and 3 is to should the threshold speed of data syn-chronization mode.If Binlogdump thread checks that the user name oneself connected is DRC, can determine that this thread self needs speed limit in conjunction with the restriction of this speed, then oneself can be added speed limit list by Binlogdump thread, and specifically the thread identification of oneself correspondence is added list, speed limit is listed as follows table 2:
The list of table 2 speed limit
User name Thread identification
DRC X1
DRC X2
jingwei X3
Table 2 as above, have recorded in speed limit list and need by the thread identification of speed limit (multiple thread may be had to be all use DRC mode to pull Binlog), this speed limit list is mainly used for for synchronization monitoring module, the thread that synchronization monitoring module only comprises speed limit list carries out the monitoring of data transmission speed, will the dormancy condition of adjustment thread if the speed of thread is too high, these are follow-up describes in detail in the execution flow process of synchronization monitoring module.In like manner, if when Binlogdump thread is out of service, such as thread terminates or disconnects, then the thread identification of self correspondence also can remove from above-mentioned speed limit list by this thread.And, when each renewal arranges binlog_send_limit_users, system can travel through all threads of current operation, confined for needs thread is added speed limit list, unrestricted thread shifts out list, can not impact the operation of thread, come into force in real time, very convenient.
Binlogdump thread, after oneself is added speed limit list, also will obtain some the speed limiting parameters for control data transmission speed, such as obtains " frequency threshold value " and " dormancy time ".Should " frequency threshold value " being that Binlogdump thread meets for judging whether the dormancy condition preset, namely judging " current thread is the need of dormancy ".Such as, should " frequency threshold value " be set to " often send five times, dormancy once ", so Binlogdump thread will judge exactly from last dormancy, and more whether the transmission times of new data reaches default frequency threshold value.In specific implementation, flow process shown in Figure 5, can by increasing binlog_event_sent counting, judge that whether number of times is enough, such as, Binlogdump thread sends a binlog_event at every turn, sends and once counts increase by 1, just can dormancy when have sent five binlog_event; This counting can be reset when dormancy, recalculate the judgement starting next round.
Binlog_event_bytes_sent counting shown in Fig. 5 is the data transmission speed for calculating Binlogdump thread for synchronization monitoring module, follow-uply describes in the flow process of synchronization monitoring module.If Binlogdump thread is determined to need dormancy according to frequency threshold value, then by current thread dormancy " dormancy time " i.e. binlog_send_idle_perid microsecond, and then the Binlog_event of reading is sent.
Suppose that certain thread does not need by speed limit, such as storehouse, so for the Binlogdump thread that storehouse is synchronous corresponding judge upon actuation oneself whether should by speed limit time, to determine oneself not need speed limit, because the user name oneself do not connected in binlog_send_limit_users, does not add speed limit list by oneself, thus does not also need acquisition speed limiting parameter, directly send after reading Binlog_event, do not need to carry out dormancy.Can see, by arranging binlog_send_limit_users, speed restriction can be carried out to specific thread, such as speed restriction is carried out to DRC, jingwei, and the synchronous of standby storehouse is not limited, the more bandwidth that synchronously takies avoiding DRC, jingwei synchronously impacts standby storehouse, prevents the delay that standby storehouse is synchronous, ensure the availability in standby storehouse, improve the reliable guarantee of data.
Flow process shown in following composition graphs 6, the implementation of synchronization monitoring module is described, synchronization monitoring module is the thread for carrying out speed monitoring to Binlogdump thread, Binlogspeed monitoring thread can be called, be mainly used for the data transmission speed calculating Binlogdump thread, and adjust accordingly, realize the speeds control that data are sent.
Start, timing scan speed limit list upon actuation along with the startup of database server AliSQL see Fig. 6, Binlogspeed monitoring thread, if thread is not empty, there is thread in namely speed limit list, then calculate the data transmission speed of this current thread.When computing velocity, Binlogspeed monitoring thread can be obtain from Binlogdump thread to send parameter, count than binlog_event_bytes_sent as shown in Figure 5, Binlogdump thread often sends a binlog_event, byte number corresponding for this event will be added up, Binlogspeed monitoring thread calculates the data transmission speed of Binlogdump thread according to the byte number sent and time.
Such as, this Binlogspeed monitoring thread performs once every 1 millisecond, namely carries out the calculating of a transmission speed every 1 millisecond; When in distance, once computing velocity reaches 1 millisecond, the binlog_event_bytes_sent counting that current Binlogdump thread feeds back by Binlogspeed monitoring thread does difference with counting during last calculating, the byte number sent within 1 millisecond of time exactly, can calculate speed.
Binlogspeed monitoring thread is by the above-mentioned data transmission speed calculated, compare with the threshold speed preset, and and then adjustment preset dormancy condition, specifically adjust the net_thread_frequency member in Binlogdump thread, this constituent parameters is used to indicate transmission frequency, this transmission frequency i.e. above-described frequency threshold value, by adjusting the control of this frequency threshold value realization to data transmission speed.
Such as, if data transmission speed is lower than threshold speed, then adjust net_thread_frequency member, improve transmission frequency.Such as, frequency threshold value is before adjustment 5, namely often sends the dormancy of 5 Binlogdump threads once; Through comparing discovery, need to improve transmission frequency, change to after adjustment and often send 3 dormancy once, frequency threshold value reduces.
Again such as, if data transmission speed is higher than threshold speed, then adjust net_thread_frequency member, reduce transmission frequency.Such as, frequency threshold value is before adjustment 5, namely often sends the dormancy of 5 Binlogdump threads once; Through comparing discovery, need to reduce transmission frequency, change to after adjustment and often send 7 dormancy once, frequency threshold value improves.
Binlogspeed monitoring thread is for each thread in speed limit list, speeds control is carried out in a manner mentioned above in capital, namely some relevant transmission parameters of this Binlogdump thread are obtained, the data transmission speed of computational threads according to this, and combine the threshold speed adjustment transmission frequency preset, frequency threshold value is changed; Binlogdump thread judges whether to carry out dormancy according to this frequency threshold value, thus data transmission speed obtains corresponding adjustment.When after the transmission frequency determining certain Binlogdump thread, the next thread that Binlogspeed monitoring thread will obtain in speed limit list, still performs above-mentioned speeds control.
When after all threads in traversal complete speed limit list, after Binlogspeed monitoring thread will abdicate CPU1 millisecond, again scan speed limit list, namely Binlogspeed monitoring thread can every millisecond of execution once.
The data synchronization control method of the present embodiment, by arranging binlog_send_limit_users, accurately can limit the data transmission speed of given thread, such as binlog_send_limit_users=drc:3, Binlogdump thread exactly for DRC mode has carried out the restriction of upper limit speed, thus the data syn-chronization of the effective mode such as control DRC, jingwei can take more bandwidth and delayed impact is synchronously caused to standby storehouse, ensure that upgrading in time of standby storehouse, also avoid that data syn-chronization speed is too high to be taken too much bandwidth and impact the response of business.In addition, the method is adopted to carry out speed limit to certain thread, very large impact can not be caused to thread, as long as join speed limit list by needing the thread of speed limit, monitoring thread can scan this speed limit list, carry out speeds control to the thread in list, monitored thread does not need to reconnect, and adding list can carry out coming into force of speeds control.And the method realizes at database (such as AliSQL) kernel, and scheme is unified, is easy to O&M scheduling.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.

Claims (10)

1. a data synchronization control method, is characterized in that, described method is applied to data syn-chronization control device, and described device comprises data transmission blocks and synchronization monitoring module; Described method comprises:
Data transmission blocks obtains more new data to be synchronized;
Described data transmission blocks judges whether to meet the dormancy condition preset, and if so, then described more new data, after the dormancy time through presetting, is sent to synchronous device by described data transmission blocks.
2. method according to claim 1, is characterized in that, described default dormancy condition is: from last dormancy, more the transmission times of new data reaches default frequency threshold value.
3. method according to claim 1, is characterized in that, before described data transmission blocks obtains more new data to be synchronized, also comprises:
Described data transmission blocks obtains the speed-limiting messages preset, and described speed-limiting messages comprises: the mark of data syn-chronization mode and the threshold speed of corresponding described data syn-chronization mode;
When the data syn-chronization mode determining that described data transmission blocks uses is identical with the mark in described speed-limiting messages, the module id of self correspondence is added speed limit list by described data transmission blocks, to make described synchronization monitoring module according to the module id in described speed limit list, the described default dormancy condition that described data transmission blocks is corresponding is set.
4. method according to claim 3, is characterized in that, describedly arranges described default dormancy condition corresponding to described data transmission blocks, comprising:
Described synchronization monitoring module calculates the data transmission speed of described data transmission blocks;
When determining described data transmission speed lower than described threshold speed, the described default dormancy condition of described synchronization monitoring module adjustment, improves to make described data transmission speed;
When determining described data transmission speed higher than described threshold speed, the described default dormancy condition of described synchronization monitoring module adjustment, reduces to make described data transmission speed.
5. method according to claim 3, is characterized in that, also comprises:
When described data transmission blocks is out of service, the module id of self correspondence removes from described speed limit list by described data transmission blocks.
6. a data syn-chronization control device, is characterized in that, comprising: data transmission blocks and synchronization monitoring module; Wherein,
Described data transmission blocks, for obtaining more new data to be synchronized, and judge whether to meet the dormancy condition preset, if so, then described more new data, after the dormancy time through presetting, is sent to synchronous device by described data transmission blocks; Described default dormancy condition is by described synchronization monitoring module installation.
7. device according to claim 6, is characterized in that, described default dormancy condition is: from last dormancy, more the transmission times of new data reaches default frequency threshold value.
8. device according to claim 6, is characterized in that,
Described data transmission blocks, also for before obtaining more new data to be synchronized, obtain the speed-limiting messages preset, described speed-limiting messages comprises: the mark of data syn-chronization mode and the threshold speed of corresponding described data syn-chronization mode; When the data syn-chronization mode determining that described data transmission blocks uses is identical with the mark in described speed-limiting messages, the module id of self correspondence is added speed limit list by described data transmission blocks;
Described synchronization monitoring module, for according to the module id in described speed limit list, arranges the described default dormancy condition that described data transmission blocks is corresponding.
9. device according to claim 8, is characterized in that,
Described synchronization monitoring module, for calculating the data transmission speed of described data transmission blocks; When determining described data transmission speed lower than described threshold speed, the described default dormancy condition of described synchronization monitoring module adjustment, improves to make described data transmission speed; When determining described data transmission speed higher than described threshold speed, the described default dormancy condition of described synchronization monitoring module adjustment, reduces to make described data transmission speed.
10. device according to claim 8, is characterized in that,
Described data transmission blocks, also for when described data transmission blocks is out of service, removes the module id of self correspondence from described speed limit list.
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CN113225207A (en) * 2021-04-16 2021-08-06 北京科东电力控制系统有限责任公司 Method and device for synchronizing active and standby messages of power system

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CN106230709A (en) * 2016-09-14 2016-12-14 广东欧珀移动通信有限公司 The method and device that the difference of a kind of chat message synchronizes
CN106230709B (en) * 2016-09-14 2020-02-14 Oppo广东移动通信有限公司 Method and device for distinguishing and synchronizing chat information
CN108460047A (en) * 2017-02-21 2018-08-28 阿里巴巴集团控股有限公司 Method of data synchronization and equipment
CN108460047B (en) * 2017-02-21 2021-11-16 阿里巴巴集团控股有限公司 Data synchronization method and device
CN107545060A (en) * 2017-08-31 2018-01-05 聚好看科技股份有限公司 A kind of method for limiting speed and device of redis principals and subordinates full dose synchrodata
CN110032398A (en) * 2018-01-12 2019-07-19 广东欧珀移动通信有限公司 Application processing method and device, electronic equipment, computer readable storage medium
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CN109471716A (en) * 2018-09-26 2019-03-15 努比亚技术有限公司 A kind of application thread processing method, terminal and computer readable storage medium
CN112783907A (en) * 2020-12-31 2021-05-11 深圳云天励飞技术股份有限公司 Data updating method, application end data updating method and related products
CN113225207A (en) * 2021-04-16 2021-08-06 北京科东电力控制系统有限责任公司 Method and device for synchronizing active and standby messages of power system
CN113225207B (en) * 2021-04-16 2022-11-01 北京科东电力控制系统有限责任公司 Method and device for synchronizing active and standby messages of power system

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